In this task, you are given a sentence and a question, you would be asked to create the answer which is contained in the sentence provided.

Example Input: Sentence: Beta decay occurs when an unstable nucleus emits a beta particle and energy. Question: What occurs when an unstable nucleus emits a beta particle and energy?
Example Output: beta decay

Example Input: Sentence: Nuclear energy is released when the nucleus of an atom is split. Question: What kind of energy is released when the nucleus of an atom is split?
Example Output: nuclear

Example Input: Sentence: Blood from the lungs enters into the left atrium. Question: Which side of the heart does blood from the lungs enter into?
Example Output:
left atrium

